120
Obligatory Sold a Story podcast link.
I can't help but feel that a lot of this is deliberate, the end result of decades of dismantling the public education system to further divide kids into the upper class in private schools, religious fundamentalists in home schooling, and everyone else abandoned to keep the population uneducated and in worse economic precarity.
Somebody please tell me that the kids are alright 
the kids heads are a little too fucked up for the plan of having them all sit silently in classrooms to work out well. the statistics are bad. you need like two kids who have disruptive interactions that give them more dopamine than learning euclidean geometry and you're cooked